Nut lock



Dec. 27, 1938.

J. V. UHERKOVICH NUT LOCK Filed April 1, 1937 cfuZucs V Uherhov'zlohATTORNEYS NWT reuse v. Uherkovich, om, ma.

Appiicahon a t-u i, 1937, Serial No. 134,435

1 Claim.

The invention relates to nut locks and more especially ratchet actingnut locks.

The primary object of the invention is the provision of a nut lock ofthis character, wherein on the fastening of ,a nut carrying bolt in apiece of work the nut on the bolt can be turned in one direction for thesecure fastening of the bolt in place without any liability of the nutworking loose from its adjusted position and when it beit comesnecessary to loosen the nut or free the same from the bolt, such nutmust be unlockedr'the manner of locking of the nut on the bolt beingnovel and to allow thefreeing of the nut it is necessary to release thefollower washer which is it slidably keyed to the bolt, provisionbeingmade for so doin Another object of the invention is the provisionof a nut lock of this character, wherein the follower washeris-interfitted with the nut in a manner to eliminate any possibility ofundue sep-' aration of the said washer from the nut particularly wherethe nut carrying bolt isengaged in woodwork and shrinkage occurs in thelatter and thus there is no possibility of the accidental loos- 25 eningof the nut on the bolt which might possibly occur should there be aseparation of the washer from the nut.

A further object of the invention is the provision of a nut lock of thischaracter, wherein he a nut is positively locked on adjustment upon abolt-without liability of the bolt becoming loose or free from work orthe nut working oil of the bolt. A still further object of the inventionis the 35 provision of a nut lock of this character, wherein the nutproper and a washer are specially designed for coaction with each otherand also with a bolt for the secure fastening of the bolt andv nut in apiece of work without liability of the o loosening of the bolt or nutwhen so fastened.

A still furtherobiect of the invention is the provision of a nut lock ofthis character, which is simple in its construction, thoroughly reliableand eflective in operation, strong, durable, and inex- 45 pensive tomanufacture.

With these and other objects in view, the invention consists in thefeatures of construction, combination and arrangement of parts as willbe hereinafter more fully described, illustrated in the 50 accompanyingdrawing, which discloses the preferred and modified forms of embodimentof the invention and pointed out in the claim hereunto app nded.

In the accompanying drawing:

5 Figure 1 is a fragmentary perspective view of a bolt showing a nutlock constructed in accordance with the invention in associationtherewith.

Figure 2 is a vertical longitudinal sectional view thereof.

Figure 3 is a plan view of a nut looking toward 5 the inner end thereof.

Figure 4 is a plan view of thewasher for cooperation with the nut. 1

F gure 5 is a perspective view of the washer.

Figure 6 is a side elevation showing a modified form of nut lock.

Figure 7 is a top plan view of the nut lock assembly.

Figure 8 is a plan view of the washer employed in the modified form ofnut lock.

Figure 9 is a vertical longitudinal sectional view through the bolt andnut with the washer in association.

Similar reference characters indicate corresponding parts throughout theseveral views in 29 the drawing;

Referring to the drawing in detail, particularw Figures 1 to 5inclusive, it designates generally a portion of the stem or shank of abolt externally threaded at l I and having longitudinally disposedtherein a channel or groove forming a key way l2, this beingconventional, while carried by the shank or stem in is an internallythreaded nut l3 preferably externally flat faced for wrench enmost endthereof is provided with an enlarged circular flat face it in which iscut an annular series of sunken ratchet teeth 15 being concentric to thestem or shank W of the bolt while coacting with the said teeth is a.springy ratchet pawl or dog it cut and bent from a washer ll to protrudefrom the face It thereof confronting the face It of the nut.

The washer I7 is formed with the usual central hole or opening it foraccommodating the 40 shank or stem it and projected into this hole oropening It is a shearing key or lug 20 accommodated within the slot orchannel forming the key way 82 in the stem or shank it. The key 2@ nextto the wall of the hole or opening I9 is weakened at 2| for easyshearing thereof so that the nut It when through ratchet action has beenworked home' on the bolt can be readily and easily loosened or workedoff of the bolt, this being accomplished by the insertion of a suitableinstrument or tool through the channel or groove E2 in the shank-or stemit for the breaking or shearing off of the key 20 which frees the washerH for rotation on the bolt and gagement therewith. This nut l3 at theinner- 30 V likewise permits the turning ofi of the nut is therefrom.

The pawl or dog it due to its location on the washer ill will beinaccessible when the nut i3 contacts with the washer H and the saidpawl or dog is engaged with the teeth 85. Therefore, to loosen the nutwhen locked with the washer and the latter keyed to the bolt, it isnecessary to break or shear the key it from the said washer H which key29 engages in the key way it to prevent rotation of the washer upon thebolt and thus in this manner the nut can be unscrewed or worked ofi ofthe bolt.

In Figures 6 to 9 of the drawing there is shown a modified form of nutlock wherein the nut 22 is formed with an enlarged circular inner end 23adapted to lie next to a washer E i keyed at 25 in the channel or groove25 in the shank or stem 2? of the bolt and this end 23 at its outerperipheral edge is beveled at 28, said edge being also provided withratchet teeth 29 while the washer has cut and bent peripherallytherefrom springy ratchet acting pawls or dogs 30. These pawls or dogs30 at their ratchet acting ends are bent or a greater number created onthe washer 2t.

The washer it being slidably keyed with the shank or stem ill of thebolt and thedogs or vpawls 30 engaging the teeth 29 on the nut 22 causesthe locking of the nut on the" bolt and through ratchet action the nutcan be adjusted in one direction for the tightening of the bolt and nuttogether in a piece of work. Should the bolt and nut in: used in woodsusceptible of shrinkage and if the latter occurs, there is nopossibility of the accidental separation of the washer 2% from the nut22 due to the overlapping of the pawls or dogs 39 onto the beveledperiphery 28 of the nut 22' as the latter and the said washer areinterfitted with each other against separation. When it is desired tofree the nut,

groove therein and a nut adjustable on said bolt,

comprising a member loosely fitting said bolt and having a shearingprojection engageable in said 2! groove and accessible through saidgroove in an axial direction of the bolt, and ratchet means on saidmember and operating upon said nut, the said shearing projection havinga weakened point,"'the said ratchet means being concealed between saidmember and the nut.

JULIUS V. KOVICH.

